CN100485211C

CN100485211C - Viscoelastic frictional damping device in use for reducing vibration of high-speed rotor system

Info

Publication number: CN100485211C
Application number: CNB2007100725326A
Authority: CN
Inventors: 王黎钦; 李文忠; 古乐; 郑德志
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 2007-07-20
Filing date: 2007-07-20
Publication date: 2009-05-06
Anticipated expiration: 2027-07-20
Also published as: CN101093007A

Abstract

This invention relates to a vibration-reductive viscoelastic friction damp device of a high speed rotor system composed of an internal ring, a damp conical ring, a damp plane ring, a supporting ring, an end cover, a shell and a locating block, in which a cone and an outer shoulder end face are set on the outside wall of the inner ring, the conical ring is fixed on the inside wall of the supporting ring, the plane ring is fixed on the inside wall of the cover, one side of the supporting ring holding the conical ring is set on the cone of the inner ring matched to the inner cone of the conical ring, one side of the cover holding the plane ring is contacted with the outer shoulder end surface of the inner ring, the supporting ring and the cover are fixed on the inside wall of the shell and the locating block is fixed on the top of the inner ring.

Description

Viscoelastic frictional damping device in use for reducing vibration of high-speed rotor system

Technical field

The present invention relates to a kind of damping device.

Background technique

At present, the high-speed rotor system vibration damping adopts the composite structure of yielding support and squeeze film damper mostly, but the discrete processing of each element of squeeze film damper, because design is improper or to add dimensional accuracy control in man-hour bad, it is inconsistent to cause assembling squeeze film gap, back, the assembly quality instability, and the assembling back is difficult to adjust again; Also can can't form squeeze film owing to oil-poor or oil-break, cause vibration damping to lose efficacy, squeeze film damper needs oil supply system simultaneously, causes the system architecture complexity.

Summary of the invention

In order to overcome the system architecture complexity of squeeze film damper, easily oil-poor or oil-break and can't form squeeze film, the shortcoming that causes vibration damping to lose efficacy the invention provides a kind of viscoelastic frictional damping device in use for reducing vibration of high-speed rotor system.

The present invention is by interior ring, the damping material conical ring, the flat ring of damping material, support ring, end cap, shell and positioning block are formed, the outer wall of ring is provided with the conical surface and outer shoulder end face in described, the damping material conical ring is installed on the inwall of support ring, the flat ring of damping material is installed on the inwall of end cap, the side that support ring is equipped with the damping material conical ring is contained on the conical surface of interior ring, and the inner conical surface of damping material conical ring matches with the conical surface of interior ring, the side that end cap is equipped with the flat ring of damping material contacts with the outer shoulder end face of interior ring, support ring and end cap are installed on the inwall of shell, the top of ring in positioning block is installed on, the inwall of shell and support ring respective side along the circumferential direction is a dentation structure.

This apparatus structure is simple, do not need lubricant oil as working medium, can simplify oil supply system, avoid oil-break, the oil-poor vibration damping that causes to lose efficacy fully, rigidity of the present invention can reach than rolling bearing support stiffness and reduce by two orders of magnitude simultaneously, damping factor can reach more than 0.5, and rigidity and damping select different structural parameter can obtain different-stiffness and damping not with the size variation of vibration displacement.

Description of drawings

Fig. 1 is a plan view of the present invention, and Fig. 2 is the A-A sectional drawing of Fig. 1, and Fig. 3 is the plan view of interior ring 1, and Fig. 4 is the B-B sectional view of Fig. 3, and Fig. 5 is the plan view of shell 6, and Fig. 6 is the C-C sectional view of Fig. 5.

Embodiment

Embodiment one: below in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6 specify present embodiment, present embodiment is by interior ring 1, damping material conical ring 2, the flat ring 3 of damping material, support ring 4, end cap 5, shell 6 and positioning block 7 are formed, the outer wall of ring 1 is provided with the conical surface and outer shoulder end face in described, damping material conical ring 2 is installed on the inwall of support ring 4, the flat ring 3 of damping material is installed on the inwall of end cap 5, the side that support ring 4 is equipped with damping material conical ring 2 is contained on the conical surface of interior ring 1, and the inner conical surface of damping material conical ring 2 matches with the conical surface of interior ring 1, the side that end cap 5 is equipped with the flat ring 3 of damping material contacts with the outer shoulder end face of interior ring 1, support ring 4 and end cap 5 are installed on the inwall of shell 6, the top of ring 1 in positioning block 7 is installed on.Shell 6 is a dentation structure along the circumferential direction with the inwall of support ring 4 respective side, makes total have lower rigidity.Rolling bearing is installed on the interior ring of above-mentioned damping device, interior ring only with viscoelastic damping material conical ring peace loop contacts, and and between the end cap, supporting ring certain interval is arranged; Interior ring can be made radial translation, but the rotation of the sub-axis that rotates is limited, and interior ring bears radial load by the conical surface and the plane of both sides, by the conical surface radial load is become thrust load simultaneously, makes the shell elasticity tooth and hair give birth to the axial bending distortion.Ring rotated planar translation in positioning block was used for limiting.When rotor causes radial vibration because of unbalanced force, vibration is passed to interior ring from bearing, interior ring slides with the surface of contact generation of the flat ring of viscoelastic damping material, conical ring, damping material deforms simultaneously, the viscoelastic damping material conical ring promotes supporting ring, radial force is changed into axial force, be delivered on the Elastic Teeth of shell, Elastic Teeth is bent.This structure by viscoelastic damping material distortion and consume vibrational energy with the friction of two surface of contact of interior ring.

Embodiment two: specify present embodiment below in conjunction with Fig. 2, support ring 4 is fixedlyed connected with the Elastic Teeth of shell 6 in the present embodiment, make be connected between support block and the shell more firm.

Embodiment three: specify present embodiment below in conjunction with Fig. 2, present embodiment end cap 5 is connected by the interior threaded hole of screw thread with shell 6, and by being threaded end cap is connected with shell more firm.

Embodiment four: specify present embodiment below in conjunction with Fig. 1 and Fig. 2, the lower end surface of present embodiment positioning block 7 is provided with the latch 7-1 that one group of groove between the Elastic Teeth with shell 6 matches, positioning block 7 is fixedlyed connected with shell 6 by the latch 7-1 in the groove between the Elastic Teeth that is stuck in shell 6, with relatively rotating between ring 1 and the shell 6 in limiting.

Claims

1, viscoelastic frictional damping device in use for reducing vibration of high-speed rotor system, it is by interior ring (1), damping material conical ring (2), the flat ring of damping material (3), support ring (4), end cap (5), shell (6) and positioning block (7) are formed, the outer wall that it is characterized in that described interior ring (1) is provided with the conical surface and outer shoulder end face, damping material conical ring (2) is installed on the inwall of support ring (4), the flat ring of damping material (3) is installed on the inwall of end cap (5), the side that support ring (4) is equipped with damping material conical ring (2) is contained on the conical surface of interior ring (1), and the inner conical surface of damping material conical ring (2) matches with the conical surface of interior ring (1), the side that end cap (5) is equipped with the flat ring of damping material (3) contacts with the outer shoulder end face of interior ring (1), support ring (4) and end cap (5) are installed on the inwall of shell (6), positioning block (7) is installed on the top of interior ring (1), and shell (6) along the circumferential direction is a dentation structure with the inwall of support ring (4) respective side.

2, viscoelastic frictional damping device in use for reducing vibration of high-speed rotor system according to claim 1 is characterized in that support ring (4) fixedlys connected with the Elastic Teeth of shell (6).

3, viscoelastic frictional damping device in use for reducing vibration of high-speed rotor system according to claim 1 is characterized in that end cap (5) is connected by the interior threaded hole of screw thread with shell (6).

4, viscoelastic frictional damping device in use for reducing vibration of high-speed rotor system according to claim 1, the lower end surface that it is characterized in that positioning block (7) is provided with the latch (7-1) that one group of groove between the Elastic Teeth with shell (6) matches, and positioning block (7) is fixedlyed connected with shell (6) by the latch in the groove between the Elastic Teeth that is stuck in shell (6) (7-1).